Presser-foot mechanism.



F. M. PECK.

PRESSER FOOT MECHANISM.

APPLICATION FILED 00115. 1915.

1,206,903. Patented Dec. 916.

I 2 $HEETS$ F. M. PECK.

PRESSER FOOT MECHANISM.

' 'APPUCATION FILED OCT. 5. I915. 1,206,903. Patented Dec. 5,1916.

2 SHEETS-SHEET 2.

fioven/lors onrrnn s'rn'rns PATENT oFFIoiE.

FlR-ANK M. IECK, OF MILLIS, MASSACHUSETTS, ASSIGNCR T UNITED SIHLOEMACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PBESSER-FOOT .MEQHANISM;

mosses.

Specification of Letters Patent.

Application filed October 15, 1915. Serial No. 56,149.

To all whom it may concern.-

Be it known that I, FRANK M. Pack, a citizen of the United States;residing at Millie, in the county of Norfolk and State of Massachusetts,have invented certain new and useful Improvements in Presser-FootMechanism; and I do hereby declare the following to be a full, clear,and exact description of the invention, such-as will enable othersskilled in the art to which it appertains to make and use the same.

The present invention relates to shoe sewing machines and moreparticularly to presser foot mechanism employed in connection with suchmachines. I

' The object of the present invention is to provide certain new anduseful in'iprovements in connection with presser foot locking mechanismfor sewing machines.

With this object in view the several features of the invention consistin certain novel features of construction, combinations and arrangementsof parts hereinafter described and claimed, the advantages of which willbe obvious to those skilled in the art from the following description.

In the accompanying drawings illustrat ing the preferred form of theinvention; Figure 1 illustrates a side elevation of a sewing machineembodying the invention; Fig. 2 is a detail partly in section of themechanism for locking the controlling bar; Fig.

3 is a view similar to Fig. 1 showing a 1011- gitudinal section of thelocking mechanism; Fig. 4 is a cross section on the line Jr-l of Fig. 2;Fig. 5 is a detail illustrating a portion of the operating connectionsfor the clanniing device; igs. ('1 and 7 are details illustrating theoscillatory locking cam; and Figs. 8 and f) are details showing the.cooperating cam plate.

'lhe machine shown in the illustrated embodiment of the invention issubstantially the same as that disclosed in the application of Ashworth,tier. No. 769,566, Iilcd May '24, 1913. This machine comprises a worksupport 1 and a cooperatingpresscr foot 2 which is mounted upon one endof a presser foot leverl fulcrumed at S The presser foot is actuatedduring); the operation of the machine to first engage \"ieldin; ;ly withthe work and then positively move a predetermined distance to clamp thework during the formation of a stitch and is finally elevated andretained in this position during the feeding movement of the work afterwhich the cycle of operations is repeated. In order to actuate thepresscr foot in this manner the lower end of the presser foot lever isconnected through a link 7 with an actuating lever S pivoted between itsends to a controlling bar 9 which is locked at predetermined intervalsin a block or head 10 through a locking: device indicated gem erallyatll to be hereinafter described. The controlling bar 9 is connectedwith a tension spring 13 which normally tends to swing the prcsser tootlever in a direction to move the presser foot into engagement with thework. The upper end of the actuating lever Sis connected to the lowerend of the usual opcratinglever 12") through a link us. The actuatinglever is fulcrumeitat H and has its opposite end operativelv connectedwith a rotar i cam disk indicated at 17. At the completion o't'thefeeding movement when the work is to be clamped in position by thepresser toot the controlling bar 9 is free to move and the spring 1%:u-cordingly swings the actuating lever 8 about the connection with thelink 16 to move the presser foot into yieldint, engagement with thework. The controlling bar is then locked in position and the cam disk 17operates tl'irough the lever 15 to swing the actuating lever about theconnection with the bar 9 to imof Figs. 2 and 3 of the drawings that theclamping head 20 is provided with apertured arms through which the rod 9passes, and upon moving the head" relative to the block 10 the armschfinp the rod securely in the head. In order to cause a relativemovement of tlie c'lamping head 20 and the block 10 an actuating cam isjournaled in the block,,and cooperates-with a. cam secured in theclamping head. To this end an actuating eam-:2 is received in a recessformed in the block 10 and is journaled BEST AVAILABLE COP- upon thehead of a stud 22-3 threudedly secured in the .mpmg llQld 20. "incactusting ineinl c is provided. with cam tacos 24 which o wrzue withcorres fionding cam r formed upon a cam plate 26 which l l!) u recesslormcd H1 the its upper end with zrsliding head which is guided relativeto the block i=6 bye cooperating rib and groove indicated.- ot 30.

he movements of the slide block are controlled in the usual mannerthrough a curved lever 31 fulcrumed upon a shaft 32 and connectecl atone end to the block through link 33 threudedly secured in the block, asshown clearly in Figs. 1 and 5. .The lever 31 is normally retained inposition to lock the controlling bur through a spring connected with.the opposite end of the. lever 31 and is unlocked at prcdeter minedintervals by an arm 36 fulcrumed upon the shaft and connected to thelever 31 through the usual type of lost motion connection.

While it ispreferred to employ the specific construction and arrangementof parts shown and described, it will be understood that thisconstruction anchor-rangement is not essential except so fcras specifiedinthe claims, and may be changed or modified without departing from' thebroader features of the invention.

The ini ention having been described, what is cliimed is:-

l. A presser foot mechanism for sewing machines, having in combiimtion,:1 presser foot, e controlling bar connect-ed with the nee-coca with thehead, and mechanism for oscillating the cam member during each cycle ofoperationsof the machine to actuate the clznnpinghead.

2. A piesser footniuhunism for sewing machines, haying in con'ibination,a presser foot, a controlling bur connected with the presser foot, :1.block through which the bar passes, a clamping head supported upon theblock, an oscillatory cam member journaled in the block, a cooperatingcam plate secured in the head, and means for oscillating the cum memberduring each cycle of operations of the machine.

3. A presser foot mechanism for sewing machines, having in combination,a presser foot, a controlling bur connected with the resser-foot, ablock through which the bar passes", a clumping head having apcrturedarms through which the bar passes, a cum member julll'lltlletl in theblock and operatively connected with the head, and means for oscillatingthe cum member during each cycle of operations of the machine to actuatethe clamping jaw.

ell A presscr foot mechanism for sewing machines, having in combination,a presser foot, a controlling bar connected with the Presser foot, ablock through which the bar passes, a clamping head supported upon theblock, a stud secured inthe head, a cam member journaled upon the stud,a cooper? nting cam platesecurcdtothe headfand means for oscillating the(rain member during each cycle of operations of the machine: 5. Apresser foot mechanism for sewing machines, having in combination, aPresser foot, a controlling bar connected with the resser foot, a blockthrough which the bar passes, a clamping head, a camifo'r actuating thehezid, anu standingorm connected to the cam, .ash ing head connected tothe upper end of the arm, and means for actuating the head during eachcycle, of operations of the machine.

' FRANK Mi PECK.

